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Mold on Weed: Causes and Effects

mold on weed

Mold is easy to detect in items such as bread, cheese, or fruits. However, it is a very different story when it comes to cannabis. Mold on weed is hard to detect and even identify especially if you are not familiar with it or there is no meticulousness in your blood.

Mold is a fungus that thrives in moisture, it develops as a multicellular filament known as hyphae. Molds can be found mostly on perishable foods that do not have any preservatives or any preservation quality once exposed to room temperature.

Read on for you to learn of the causes and effects of molds on weed!

How to Spot Mold on Weed? 

Spotting mold on weed is a tricky thing to do, this is because of the Trichomes found in cannabis, Trichomes are parts of the plant or flower that look like hair particles that are somewhat silver-ish white. These hair-like particles store the cannabinoids that produce the chemical needed to provide the euphoric high.

When a flower is covered or engulfed with trichomes it is hard to identify if there is a weed, however, if you look closely, the mold will always look like a fuzz of somewhat earthy, blackish, or greyish. And mold will grow or develop both in the surface of the bud as well as the endings of the trichomes.

Contaminated or moldy weed smells funky, there is no freshness in it. Fresh weed smells very appealing while moldy weed has a foul smell or a rotting smell that will turn you off. If you are still having a hard time distinguishing the smell of mold, try sniffing a rotting apple filled with weed.

Why Mold on Weed is Bad and Dangerous: Causes and Effects

Having Moldy Weed? Here’s How to Remedy It!

First, do not even attempt to smoke that moldy weed. You cannot take any risk in that. The first sign you see mold, you have to cut that part where it is present regardless of the wastage.

It is imperative to discard weed with mold, inhaling the spores of mold alone is very dangerous. This is very true if the user has already a very weak immunity or immune system. Inhaling a huge number of spores can lead to the following health issues.

  • lung irritation
  • asthma
  • a variety of allergic reactions
  • Headache or migraines
  • cough
  • pneumonia
  • chest pain

The main point is that having mold spores in the lungs is a big deal. Having a tiny amount of mold in your weed can spread spores everywhere that can affect the rest of the crops as well as your surroundings. The best thing to do is to discard the affected plant and as much as possible protect what you have left.

Prevention Is Key

Having Moldy Weed? Here’s How to Remedy It!

The best legit way to remedy moldy weed is preventing the mold to even grow. Mold can appear or grow on weed if they are incorrectly stored in the wrong container or environment. This is very evident due to the humidity and temperature.

Mold spores are present everywhere. There is no proven way to stop or eliminate the presence of the spores. However, the good thing to do is to stray away from places and environments where those mold spores can thrive and mature into destructive molds.

A specific type of mold grows in parameters that are warm and humid, thus places that have limited circulation. Other types of molds appear in colder places but with high humid levels. Read on the list below on how to stay away from these harsh conditions;

Regulating the Temperature and Humid

When cultivating weed or cannabis, be particular on the level of humidity as well as the strict monitoring of the temperature. To achieve this, prepare a hygrometer that checks the level of humidity and a cold old thermometer to check the temp in your breeding room. Monitor them religiously.

In the beginning phases of the weed’s cycle, there is a huge need for humid, this goes up to 70 percent. As the plant enters the vegetative phase, the humidity must be decreased between 40 and 70. When the plant reaches the budding or flowering phase, the humid needs to be lowered to 40-50 percentile. Others lower it further to 30 percent when it is close to the harvesting stages.

As for the temperature side of the matter, do not let the breeding ground or room reach more than 80 degrees Fahrenheit or any colder than 68 degrees. Be familiar with how to maintain the 75 degrees temperature from the starting point up to the harvest time.

Air Circulation

To eliminate the growth of mold, you have to maintain a quality air circulation. The development of molds is evident if the environment has a stagnant air. To have consistent air circulation, prepare an abundant amount of fans. Also, prepare a good ventilation plan or system that will ensure a good supply of fresh air that the plants need.


This is all due to the foliage that allows more humidity and gives a hard time for the air to circulate properly.To prevent this from ever happening, trim the plants and remove the giant leaves. Be extra careful when removing the big leaves. Trim them enough just to let the air circulate properly and effectively. This will give the mold spore a hard time to thrive.

Store Your Bud Properly

After the harvest time, you are not in the clear yet from the destructive forces of molds. To prevent your precious harvest from being destroyed, place them in an airtight container that is away from the direct rays of the sun. Avoid them from being exposed to extreme temperatures, it is advised to keep them at 75 degrees to achieve the best protection and quality.

What If Mold Still Persistent in Appearing in the Scene?

Having Moldy Weed? Here’s How to Remedy It!

If by any chance that the mold still appears in your plants, there is one last thing that you should be mindful of and start considering. Be sure to avoid chemical-based products as it can destroy the quality of the plants.


Before taking a voyage of being a master grower or a breeder, you must learn the basics as well as training your senses to detect the growth and presence of molds. As long as you follow the parameters listed above, you should already be in the clear. Always remember that the quality of weed you produce is based on how much time, effort, and perseverance to take care of the plant is invested. And that’s it, that is how you solve the problem when it comes to mold on weed as well the causes and effects it brings.

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